hikers who found a human body at high altitude in the italian alps thought the man had died recently but tests indicated he was shot with an arrow more than 5,300 years ago, which of the following would be the best reason for the prolonged preservation of the body? A. the ultraviolet rays at such a high altitude caused all the body molecules to be preserved. B. the food that the person ate contained toxins that killed the bacteria that would have otherwise destroyed the body. C. the arrow wound caused blood to flow out of the body.which led the enzymes that would break down tissue to be cleared from the body. D. the body was frozen in the cold temperature of the Alps shortly after he died and remained frozen until it was found.
Which of the following allows the AIDs virus.which contains RNA, to insert into the DNA of a host of T-cells after the AIDs virus enters the cell. A. reverse transcriptase an enzyme encoded by the body. B. receptor proteins located on the surface of the virus c. the phospholipids found on the envelope of the virus. D. the protein that makes up the capsid of the virus.
Which of the following microorganisms lack their own metabolic pathways and can only reproduce inside of a host cell? A. bacteria. B. Helminths c. protozoa. C. viruses
Which of the following chemicals is released by one type of immune cell to directly activate another type of immune cell. A. lysosomes. B. cytokines. C. perforin . D. granzymes